:root {
  --bg: #f5f7f4; --paper: #ffffff; --ink: #18211e; --muted: #5d6963;
  --green: #176b50; --soft: #dff2e9; --line: #e3e8e3;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #101613; --paper: #18211e; --ink: #edf2ee; --muted: #a3b0a9; --green: #6fd0a8; --soft: #1d3a30; --line: #2a3530; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink); overflow-wrap: anywhere;
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; gap: 12px; padding-top: 28px; padding-bottom: 8px; flex-wrap: wrap; }
.mark {
  width: 40px; height: 40px; border-radius: 12px; background: #176b50; color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 26px; line-height: 1; padding-bottom: 4px;
}
.brand { font-weight: 800; font-size: 24px; letter-spacing: -0.04em; color: var(--ink); text-decoration: none; }
.brand span { color: var(--green); }
nav { margin-left: auto; display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 600; }
nav a[aria-current="page"], nav a:hover { color: var(--green); }
main { padding-top: 12px; padding-bottom: 40px; }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.03em; margin: 28px 0 6px; }
h2 { font-size: 21px; letter-spacing: -0.01em; margin: 38px 0 8px; }
p, li { color: var(--ink); }
.meta { color: var(--muted); font-size: 15px; margin: 0 0 22px; }
.summary { background: var(--soft); border-radius: 16px; padding: 18px 20px; margin: 20px 0; }
.summary p { margin: 0 0 8px; } .summary p:last-child { margin: 0; }
a { color: var(--green); }
ul { padding-left: 22px; } li { margin: 6px 0; }
.cards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 24px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; text-decoration: none; color: var(--ink); display: block; }
.card strong { display: block; font-size: 18px; color: var(--green); margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 15px; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
footer { border-top: 1px solid var(--line); padding-top: 18px; padding-bottom: 36px; color: var(--muted); font-size: 14px; }